/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.cbg.exoplayer.utils;

import android.app.Notification;

import com.google.android.exoplayer2.offline.DownloadManager;
import com.google.android.exoplayer2.offline.DownloadManager.TaskState;
import com.google.android.exoplayer2.offline.DownloadService;
import com.google.android.exoplayer2.scheduler.PlatformScheduler;
import com.google.android.exoplayer2.ui.DownloadNotificationUtil;
import com.google.android.exoplayer2.util.NotificationUtil;
import com.google.android.exoplayer2.util.Util;

import cn.cbg.exoplayer.BaseFactory;

/**
 * A service for downloading media.
 */
public class ExoDownloadService extends DownloadService {

    private static final String CHANNEL_ID = "download_channel";
    private static final int JOB_ID = 1;
    private static final int FOREGROUND_NOTIFICATION_ID = 1;
    private BaseFactory baseFactory;

    public ExoDownloadService() {
        super(
                FOREGROUND_NOTIFICATION_ID,
                DEFAULT_FOREGROUND_NOTIFICATION_UPDATE_INTERVAL,
                CHANNEL_ID,
                cn.cbg.exoplayer.R.string.exo_download_notification_channel_name);
        baseFactory = BaseFactory.getInstance(getBaseContext());
    }

    @Override
    protected DownloadManager getDownloadManager() {
        return baseFactory.getDownloadManager();
    }

    @Override
    protected PlatformScheduler getScheduler() {
        return Util.SDK_INT >= 21 ? new PlatformScheduler(getBaseContext(), JOB_ID) : null;
    }

    @Override
    protected Notification getForegroundNotification(TaskState[] taskStates) {
        return DownloadNotificationUtil.buildProgressNotification(
                /* context= */ this,
                cn.cbg.exoplayer.R.drawable.exo_controls_play,
                CHANNEL_ID,
                /* contentIntent= */ null,
                /* message= */ null,
                taskStates);
    }

    @Override
    protected void onTaskStateChanged(TaskState taskState) {
        if (taskState.action.isRemoveAction) {
            return;
        }
        Notification notification = null;
        if (taskState.state == TaskState.STATE_COMPLETED) {
            notification =
                    DownloadNotificationUtil.buildDownloadCompletedNotification(
                            /* context= */ this,
                            cn.cbg.exoplayer.R.drawable.exo_controls_play,
                            CHANNEL_ID,
                            /* contentIntent= */ null,
                            Util.fromUtf8Bytes(taskState.action.data));
        } else if (taskState.state == TaskState.STATE_FAILED) {
            notification =
                    DownloadNotificationUtil.buildDownloadFailedNotification(
                            /* context= */ this,
                            cn.cbg.exoplayer.R.drawable.exo_controls_play,
                            CHANNEL_ID,
                            /* contentIntent= */ null,
                            Util.fromUtf8Bytes(taskState.action.data));
        }
        int notificationId = FOREGROUND_NOTIFICATION_ID + 1 + taskState.taskId;
        NotificationUtil.setNotification(this, notificationId, notification);
    }
}
